Identify and distinguish
The leaves of grass-knotted trees, equipage, and equinoxes have all been degraded. The above-ground parts are stalks, but it is difficult to distinguish these three kinds of green upright stems from the early spring break. The main characteristics of the above-mentioned three plants of the same family belonging to different species must be differentiated as follows, so that they can be identified.
Difference between stems
Ask the stems of rhizomatous stems and stems from the ground. The rhizomes are black and lie beneath the surface and there are adventitious roots between the nodes. The stem above the ground is upright, and there is no difference between the nutrition stem and the spore stem, and there is no difference between the nutrition stem and the spore stem. The stem is hollow, and the stem has 6 to 20 longitudinal edges. It is very rough, and the leaves are degraded. In the lower joint sheath, the back of the sheath is smooth. Sheath teeth short triangular, black, with a film of sharp tail, easy to fall off (see Table 1).
There are only one type of aerial culm on Equisetum, hollow, about 1 meter high, 6 to 10 cm thick stem, 20 to 30 longitudinal ribs, 2 rows of verrucose projections on the ribs, hard and rough, and leaves degenerating. Leaf sheath base and sheath teeth in two rounds, is black, the sheath tip of the top of the teeth fall down as a blunt head, the back of the sheath has two edges, the formation of shallow ditch.
There are two kinds of stems on the ground of E. quinquefolia, ie, spore stems and nutrition stems. In the early spring, the spore stems are germinated, and the meat is not branched. It is purple-brown and the sheath is long and large. The vegetative stems were born after the spore stems were shriveled. They were 0.6 meters high and had 6 to 15 longitudinal edges. The stems of both stems are degenerated, and the stems and leaves of the stems are united into sheaths. The sheaths are lanceolate, black, and their edges are gray and white. The branches are multi-layered, with only 3 to 4 longitudinal branchlets, and the stems and stems are not hollow.
Sporangial spike difference
The sporocysts of the festival grass are born on the top of the branches or on the top of small branches. They are 0,5 to 2 cm long, oblong in shape, have small pointed tips, and some are round heads and have no handles. The spore leaves are hexagonal, concave in the center, shield-like, closely arranged, and have long sporangia at the edge. There is only one kind of spore.
Equisetum spore capsule round, sessile, 0.7-1.3 cm long, born at the top of the branch, with a small pointed head. There is only one spore.
The spore sac of the equinus is born on the top of the spore stalk, 2 to 3.5 centimeters in length, round head, hexagonal spore leaf, wormlike, spirally arranged, with growth-like sporangia on the edge, spores are also a kind of .
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